(2+z)(5z-9)=0

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Solution for (2+z)(5z-9)=0 equation:


Simplifying
(2 + z)(5z + -9) = 0

Reorder the terms:
(2 + z)(-9 + 5z) = 0

Multiply (2 + z) * (-9 + 5z)
(2(-9 + 5z) + z(-9 + 5z)) = 0
((-9 * 2 + 5z * 2) + z(-9 + 5z)) = 0
((-18 + 10z) + z(-9 + 5z)) = 0
(-18 + 10z + (-9 * z + 5z * z)) = 0
(-18 + 10z + (-9z + 5z2)) = 0

Combine like terms: 10z + -9z = 1z
(-18 + 1z + 5z2) = 0

Solving
-18 + 1z + 5z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-2 + -1z)(9 + -5z) = 0

Subproblem 1

Set the factor '(-2 + -1z)' equal to zero and attempt to solve: Simplifying -2 + -1z = 0 Solving -2 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1z = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1z = 0 + 2 -1z = 0 + 2 Combine like terms: 0 + 2 = 2 -1z = 2 Divide each side by '-1'. z = -2 Simplifying z = -2

Subproblem 2

Set the factor '(9 + -5z)' equal to zero and attempt to solve: Simplifying 9 + -5z = 0 Solving 9 + -5z = 0 Move all terms containing z to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -5z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5z = 0 + -9 -5z = 0 + -9 Combine like terms: 0 + -9 = -9 -5z = -9 Divide each side by '-5'. z = 1.8 Simplifying z = 1.8

Solution

z = {-2, 1.8}

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